Tuning Kral Puncher Breaker Orings

[thammer]

Seems to be asked a lot. I don't sell oring kits but here is what I have measured and used. These are all 70 duro sizes for the Kral PB. Sizes and quantities needed. These are the same for the Mega as well except you won't need the front gauge oring. Valve, barrel, and power adjuster orings are the same for all Kral guns. The NP-03 uses an aluminum tube and the orings are slightly different. I'll have to take one apart to measure. 

Main tube

3.5mmx26mm (2)

Outer valve and the front gauge

2mmx16mm (3)

Outer barrel

1.5mmx9mm (2)

Power Adjuster 

1.5mmx3mm (2)

Fill Probe

1.8mmx5.6mm (2)

I'll have to get the breech sizes. I've never had to buy any. Only had to replace a few and just used factory spares I had lying around. 

 

[JimNM]

Thank you Troy. Are those consistent for all calibers? Breach ring being the odd ball.

 

[30harry]

Seems to be asked a lot. I don't sell oring kits but here is what I have measured and used. These are all 70 duro sizes for the Kral PB. Sizes and quantities needed. These are the same for the Mega as well except you won't need the front gauge oring. Valve, barrel, and power adjuster orings are the same for all Kral guns. The NP-03 uses an aluminum tube and the orings are slightly different. I'll have to take one apart to measure. 

Main tube

3.5mmx26mm (2). AT25/AT36 ??? Also SAE #214 oring???

Outer valve and the front gauge

2mmx16mm (3)

Outer barrel

1.5mmx9mm (2). BB46 ????

Power Adjuster 

1.5mmx3mm (2). RC77

Fill Probe

1.8mmx5.6mm (2).

I'll have to get the breech sizes. I've never had to buy any. Only had to replace a few and just used factory spares I had lying around.

Thammer, would it be possible to add the Kral part number to your list above. I added one and possibly three of the numbers.

 

[thammer]

Thank you Troy. Are those consistent for all calibers? Breach ring being the odd ball.

Correct

 

[thammer]

Thammer, would it be possible to add the Kral part number to your list above. I added one and possibly three of the numbers.

I don't have a parts number list. I just measured the guns and factory orings. Anyone is welcome to add that. 

 

[kayaker]

 thammer Thanks good info ! gave you a + in your Akela post on same info . Darell/kayaker

 

[30harry]

thammer Thanks good info ! gave you a + in your Akela post on same info . Darell/kayaker

What is a + and how do you do it? 

 

[JimNM]

Do you see the green circle with a "+" next to the word accuracy under the user name and picture? You can give a thumbs up to reliable information and/or good posts.

Here, I will send you one for asking a good question.

 

[JimNM]

FWIW - I blew another o-ring on the Nemesis. The gun started a slow leak last week, and now it won't hold much air overnight. I suspect these o-rings are common to the Kral bottle guns.

Bottle to block o-ring 23mm od X 2.5mm cross section (edited - I need to learn to read my tools)

Valve to block o-ring 16mm od x 2mm cross section

 

[30harry]

Do you see the green circle with a "+" next to the word accuracy under the user name and picture? You can give a thumbs up to reliable information and/or good posts.

Here, I will send you one for asking a good question.

Thank you.



Learned something new. 

 

[RAMJET66]

i just left you a + troy

 

[NukeBreath]

Fill probe o-ring size question. 1.8mmx5.6mm. The first number is the thickness.? Second number is OD or ID.? Thanks

 

[Mau]

I know it’s been a couple of years from the time of this question but I’ll answer it for the next person that may have this question:
• The first # is the thickness of the oring.
• The second # is the ID (Inside Diameter) of the oring.
Note: I own many PCP rifles and for that reason I buy a lot of orings. I have purchased a few different packages (different manufacturers) of fill probe orings and they all differ in sizes a little bit, the thickness that I measured differ as much as .06 mm (6 one hundredths of a mm), the ID even more, but they all work just fine, 6 one hundredths isn’t much.
My measurements of the thickness ranged from 1.75 mm to 1.81 mm.